<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <title>图书列表管理</title>
  <style type="text/css">
    .grid {
      margin: auto;
      width: 500px;
      text-align: center;
    }

    .grid table {
      width: 100%;
      border-collapse: collapse;
    }

    .grid th,
    td {
      padding: 10;
      border: 1px dashed orange;
      height: 35px;
      line-height: 35px;
    }

    .grid th {
      background-color: orange;
    }

    .grid .book {
      padding-bottom: 10px;
      padding-top: 5px;
      background-color: #F3DCAB;
    }

    .grid .total {
      background-color: moccasin;
      height: 30px;
    }
  </style>
</head>

<body>

  <div id="app">
    <div class="grid">
      <div>
        <h1>图书管理</h1>
        <div class="book">
          <div>
            <label for="id">
              编号：
            </label>
            <input type="text" id="id" v-model='id' :disabled='true' v-focus />
            <label for="name">
              名称：
            </label>
            <input type="text" id="name" v-model='name' />
            <button @click='addBook' :disabled='submitFlag'>提交</button>
          </div>
        </div>
      </div>
      <div class="total">
        <span>图书总数：</span>
        <span>{{total}}</span>
      </div>
      <table>
        <thead>
          <tr>
            <th>编号</th>
            <th>名称</th>
            <th>时间</th>
            <th>操作</th>
          </tr>
        </thead>
        <tbody>
          <tr v-for='item in books' :key='item.id'>
            <td>{{item.id}}</td>
            <td>{{item.name}}</td>
            <td>{{item.date|format('yyyy-MM-dd hh:mm:ss')}}</td>
            <td>
              <a href="" @click.prevent='editBook(item.id)'>修改</a>
              <span>|</span>
              <a href="" @click.prevent='delBook(item.id)'>删除</a>
            </td>
          </tr>
        </tbody>
      </table>
    </div>
  </div>
  <script type="text/javascript" src="js/vue.js"></script>
  <script src="./js/axios.js"></script>
  <script type="text/javascript">

    //  定义基准路径
    axios.default.baseURL = ('http:localhost:3000/')

    // 定义响应拦截器
    // axios.interceptors.response.use(function (response) {
    //   const data = response.data
    //   return data;
    // }, function (error) {
    //   // 对响应错误做点什么
    //   return Promise.reject(error);
    // });

    Vue.filter('format', function (val, param1) {
      // 对传递的时间进行格式化处理
      function dateFormat(date, format) {
        if (typeof date === "string") {
          var mts = date.match(/(\/Date\((\d+)\)\/)/);
          if (mts && mts.length >= 3) {
            date = parseInt(mts[2]);
          }
        }
        date = new Date(date);
        if (!date || date.toUTCString() == "Invalid Date") {
          return "";
        }
        var map = {
          "M": date.getMonth() + 1, //月份 
          "d": date.getDate(), //日 
          "h": date.getHours(), //小时 
          "m": date.getMinutes(), //分 
          "s": date.getSeconds(), //秒 
          "q": Math.floor((date.getMonth() + 3) / 3), //季度 
          "S": date.getMilliseconds() //毫秒 
        };

        format = format.replace(/([yMdhmsqS])+/g, function (all, t) {
          var v = map[t];
          if (v !== undefined) {
            if (all.length > 1) {
              v = '0' + v;
              v = v.substr(v.length - 2);
            }
            return v;
          } else if (t === 'y') {
            return (date.getFullYear() + '').substr(4 - all.length);
          }
          return all;
        });
        return format;
      }

      return dateFormat(val, param1)
    })
    Vue.directive('focus', {
      inserted: function (el) {
        el.focus()
      }
    })
    var vm = new Vue({
      el: '#app',
      data: {
        submitFlag: false,
        flag: false,
        id: '',
        name: '',
        books: ''
      },
      mounted() {
        this.getData()
      },
      methods: {
        // 添加和修改功能
        async addBook() {
          // 修改图书
          if (this.flag) {
            this.books.some(item => {
              if (item.id === this.id) {
                return item.name = this.name
              }
            })
          } else {
            // 添加图书列表
            const { data: res } = await axios.post('books', { name: this.name })
            if (res.status === 200) {
              this.getData()
            }
          }

          this.id = this.name = ''
        },
        // 修改功能
        editBook(id) {
          this.flag = true
          let book = this.books.filter(item => {
            return item.id === id
          })
          // console.log(book)
          this.id = book[0].id
          this.name = book[0].name
        },
        // 删除图书功能
        delBook(id) {
          this.books = this.books.filter(item => {
            return item.id != id
          })
        },

        // 获取数据列表
        async getData() {
          const { data: res } = await axios.get('books')
          this.books = res
        },
      },
      watch: {
        name: function (val) {
          let flag = this.books.some(item => {
            return item.name === val
          })
          this.submitFlag = flag
        }
      },
      computed: {
        total: function () {
          return this.books.length
        }
      }
    });
  </script>
</body>

</html>